fixing nitpicks

Author: Red Giuliano

zt_backend/models/state/notebook_state.py

@@ -14,7 +14,7 @@ def __init__(self):
 
         self.notebook_db_path = notebook_db_path
         codeCell = notebook.CodeCell(
-            id="cell_0",
+            id=str(uuid.uuid4()).split('-')[0],
             code="",
             components=[],
             variable_name="",

zt_backend/router.py

@@ -193,7 +193,6 @@ def run_all():
 def create_cell(cellRequest: request.CreateRequest):
     if app_state.run_mode == "dev":
         logger.debug("Code cell addition request started")
-        num_cells = len(notebook_state.zt_notebook.cells.keys())
         num_cells = str(uuid.uuid4()).split('-')[0]
         createdCell = notebook.CodeCell(
             id="cell_"+str(num_cells),